Index: content/browser/device_orientation/device_data.cc |
diff --git a/content/browser/device_orientation/device_data.cc b/content/browser/device_orientation/device_data.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d52bf9ea2bc89866ec8d72bb23a3bdec04a12f8f |
--- /dev/null |
+++ b/content/browser/device_orientation/device_data.cc |
@@ -0,0 +1,22 @@ |
+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include <cmath> |
+ |
+#include "content/browser/device_orientation/device_data.h" |
+ |
+namespace device_orientation { |
+ |
+bool DeviceData::IsElementSignificantlyDifferent(bool can_provide_element1, |
+ bool can_provide_element2, double element1, double element2) { |
+ const double kThreshold = 0.1; |
+ |
+ if (can_provide_element1 != can_provide_element2) |
+ return true; |
+ if (can_provide_element1 && std::fabs(element1 - element2) >= kThreshold) |
+ return true; |
+ return false; |
+} |
+ |
+} // namespace device_orientation |